OK, I guess I found what I need. Thank u anyway.

http://www.compactappliance.com/12-Volt-Travel-Coolers/Outdoor_Living-Travel_Coolers,default,sc.html?mtcpromotion=Google%3e12%20Volt%3e12%20Volt%3eAd2&src=GOOGLEPPC&gclid=CKb2oNLVwpUCFQpjnAod8BACQA